package com.qingke.practise;

public class Vehicle {
	public int speed;
	public int size;
	
	public void move(){
		
	}
	public int setSpeed(int speed){
		this.speed=speed;
		return speed;
	}
	public void speedUp(int speed){
		this.speed+=speed;
	}
	public void speedDown(int speed){
		this.speed-=speed;
	}
	public static void main(String[]args){
		Vehicle vl=new Vehicle();
	}
}
